The aim of the invention is to provide a device and a method for selecting text from an electronic memory using a numeric telephone keyboard. The use of the ridge reduces fluctuation in the color temperature of vertically operated lamps and improves efficacy. A configuration of points in a target metric space is constructed based on the distance values, where each of the points represents a respective one of the sequences. The radio communication device determines whether there is any transmission activity in response to a communication received on the non-primary channel.